The US dollar slipped 0.37% overnight, and that weaker greenback did little to steady metals as most base and precious contracts fell ahead of Wednesday’s US inflation data, with tin and zinc leading the declines on both the London and Shanghai exchanges.
Metals Fall Ahead of US CPI as Dollar Weakens

The move matters because the dollar remains the key macro driver for commodities: a softer currency typically lends support by making dollar-priced metals cheaper for non-US buyers, but this session’s broad declines show traders are still focused on demand, rate expectations and risk appetite rather than currency alone. Markets are now positioned for September US CPI, which could sharpen the Fed outlook and reset rates, the dollar and industrial metal pricing in one sweep.
On the Shanghai Futures Exchange, tin was the sharpest loser, dropping 3.52%, while zinc fell 0.97%, aluminum lost 0.45% and copper edged down 0.15%. Lead rose 1.36%, bucking the pack. In London, tin fell 3.4%, zinc slid 1.08%, nickel lost 0.54%, aluminum fell 0.59% and copper slipped 0.43%, while lead gained 1.04%.
Silver also weakened, with COMEX silver down 1.85% and SHFE silver off 1.51%, while gold was softer as traders pared positions before the inflation print. That pattern points to a cautious market rather than a broad commodity liquidation, with investors trimming exposure to rate-sensitive metals while waiting for clearer Fed guidance.
For investors, the near-term setup is binary: a cooler CPI could pressure the dollar and revive metals, while a hotter reading would reinforce higher-for-longer rate bets and keep pressure on industrial and precious metals alike. The relative strength in lead suggests some pockets of physical support, but tin and zinc remain most exposed to growth concerns and global manufacturing sentiment.
The next catalyst is US CPI, along with further Fed commentary, which will likely determine whether this overnight dip is a pause or the start of a broader repricing in metals and currency markets.
| Entity | Gains | Losses |
|---|---|---|
| US dollar bears | ▲Softer currency | ▼Dollar bulls |
| Lead futures traders | ▲Price resilience | ▼Broad metals sellers |
| Tin and zinc shorts | ▲Momentum lower | ▼Tin/zinc longs |
| Metal consumers | ▲Potentially cheaper input costs | ▼Producers and miners |




